Guest host Elliott Forrest fills in for Leonard Lopate. First, three scientists who received a Lasker Award for their discoveries concerning cytoskeletal motor proteins talk about their work. Damien Echols, one of the West Memphis Three, who was tried and convicted for the murder of three children in 1993, talks about serving almost 20 years in prison for a crime he didn’t commit. Plus, our latest Backstory segment looks at voter identification. Then we'll take a look at how the auto industry bailout is shaping the election.